For this case we have that, by definition, the slope of a line is given by:

Where:

They are points through which the line passes.
According to the figure we have that the line goes through the following points:

Substituting in the equation we have:

Thus, the slope of the line is:
Answer:

Answer:
I'm pretty sure it's the last one.
Step-by-step explanation:
The answer to the question is b
y = (x-5)^2
y = x^2-10x+25